Tlahuizcalpantecuhtli was believed to cause harm to people by shooting darts. According to the Annals of Cuauhtitlan, after Topiltzin Quetzalcoatl died, he spent four days in Mictlan making darts before emerging as the morning star.

The Annals list his victims according to the days of the Aztec calendar: old people on 1 Alligator; small children on 1 Jaguar, 1 Deer and 1 Flower; nobles on 1 Reed; everybody on 1 Death; and young people on 1 Movement. On 1 Rain, he shoots the rain, so that no rain falls, and on 1 Water, he causes drought.[5]

Tlahuizcalpantecuhtli (left) and Xiuhtecuhtli (right), surrounded by the signs of their trecena, in the Codex Borbonicus. (Click to enlarge.)